How do I build roads?

You can build roads with the Road Roller. You will find it on the Roads tab in the store. Note that the Road Roller won’t be able to build a road if there is an obstacle in its way. A square with an obstacle will be highlighted in red.
Drag the Road Roller to the place where you want to build a road. Choose an available direction and swipe from the green square to the one you want to end the road in. When you're finished, tap the checkmark to save your changes.